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Related to antiknock: antiperspirant


A substance, such as tetraethyl lead, added to gasoline to reduce engine knock.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Automotive Engineering) a compound, such as lead tetraethyl, added to petrol to reduce knocking in the engine
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌæn tiˈnɒk, ˌæn taɪ-)

of, pertaining to, or being a material added to fuel for an internal-combustion engine to eliminate or minimize knock.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.antiknock - any of various compounds that are added to gasoline to reduce engine knockingantiknock - any of various compounds that are added to gasoline to reduce engine knocking
lead tetraethyl, tetraethyl lead - a clear oily poisonous liquid added to gasoline to prevent knocking
chemical compound, compound - (chemistry) a substance formed by chemical union of two or more elements or ingredients in definite proportion by weight
Adj.1.antiknock - suppressing or eliminating engine knock in combustion engines; "antiknock properties"; "antiknock rating"
leaded - treated or mixed with lead; "leaded gasoline"; "leaded zinc"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
In a large number of alternative fuels, methanol displays fine combustion properties similar to gasoline and has such advantages as high octane number, low emissions, antiknock, rich resource, mature technology, etc., so it can be used as alternative fuel for gasoline [2].
Regular Gasoline: Gasoline having an antiknock index, i.e., octane rating, greater than or equal to 85 and less than 88.
Moreover, how to guarantee the antiknock performance and high temperature resistance of refuge capsule in the rescue process [7]?
Cadmium is released as a by-product of zinc (and occasionally lead) refining; lead is emitted during its mining and smelting activities, from automobile exhausts (by combustion of petroleum fuels treated with tetraethyl lead antiknock) and from old lead paints; mercury is emitted by the degassing of the earth's crust.
The main source of this atmospheric lead is the combustion in vehicles of fuel containing the antiknock additive.
Under the current legislation, ethyl alcohol can be added to automotive gasoline, within limits, as an antiknock agent [1, 2].
The dynamic response of RC structure components under blast loadings is tested by Antiknock studio of Tsinghua University [30].
Also , Lead emissions are associated with the use of lead compounds in gasoline as antiknock agents [12] .
The product, alkylate, an isoparaffin, has high octane value and is blended with motor and aviation gasoline to improve the antiknock value of the fuel.